i have a lot of old ''friends'' who constantly want to buy BTC over 10% of BTC.X so we would have a decent start
i already have a veryfied account to buy bitcoins if that is what you meant. so buying back is not a problem.
You have a verified account on an exhange, you have customers. Why not start a private exchange on your own?
Security will be our top priority. 3x cold storage which all the profits will go into. and of course one would need a hot wallet. the ''hot wallet'' would then be on a server build for one thing only. to keep the bitcoins on.
You need a partner to develope a public exchange for you? That is one big tough project, especially after the recent hack on bitstamp. I am not discouraging you, I think you should plan this carefully, legal, taxes, security and all. Wish you luck.